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You searched for: subject:"ecology"
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[audio]07.12.2007 lisovskiy na radio svobodniy golos - yuriy shevchuk
07.12.2007
Keywords: ecology
Downloads: 24
[texts]Particle size distribution and optimal capture of aqueous macrobial eDNA - Cameron R. Turner
1. Detecting aquatic macroorganisms with environmental DNA (eDNA) is a new survey method with broad applicability. However, the origin, state, and fate of aqueous macrobial eDNA - which collectively determine how well eDNA can serve as a proxy for directly observing organisms and how eDNA should be captured, purified, and assayed - are poorly understood. 2. The size of aquatic particles provides clues about their origin, state, and fate...
Keywords: Ecology
Downloads: 6
[texts]Beyond species: why ecological interaction networks vary through space and time - Timothée Poisot
Community ecology is tasked with the considerable challenge of predicting the structure, and properties, of emerging ecosystems. It requires the ability to understand how and why species interact, as this will allow the development of mechanism-based predictive models, and as such to better characterize how ecological mechanisms act locally on the existence of inter-specific interactions. Here we argue that the current conceptualization of species interaction networks is ill-suited for this task...
Keywords: Ecology
Downloads: 9
[texts]The dark side of theoretical ecology - Lev V. Kalmykov
Good science must be clearly transparent in its theories, models and experiments. Earlier David Tilman drew attention to the fact that ecologists investigate interspecific competition phenomenologically, rather than mechanistically. To create a mechanistic model of a complex dynamic system we need to logically describe interactions of its subsystems which lead to emergence of new properties on the macro-level...
Keywords: Ecology
Downloads: 5
[texts]Sampling principles for biodiversity study - Xubin Pan
Sampling is a fundamental tool in ecology and critical for biodiversity measurement. However, basic principles of biodiversity sampling have been overlooked for many years. In this paper, I proposed and explored five principles of sampling for a specific area and biodiversity study. The first principle of sampling, species increasing with area, is that the number of species increases with the area...
Keywords: Ecology
Downloads: 6
[texts]Exploring the spatially explicit predictions of the Maximum Entropy Theory of Ecology - Daniel McGlinn
The Maximum Entropy Theory of Ecology (METE) is a unified theory of biodiversity that attempts to simultaneously predict patterns of species abundance, size, and spatial structure. The spatial predictions of this theory have repeatedly performed well at predicting diversity patterns across scales. However, the theoretical development and evaluation of METE has focused on predicting patterns that ignore inter-site spatial correlations...
Keywords: Ecology
Downloads: 8
[texts]huang hai chao jian dai sheng tai xue yan jiu (Volume 1(2)) - gu li ya nuo wa

Keywords: ecology
Downloads: 183
[texts]Meteorological conditions influence short-term survival and dispersal in a reinforced long-lived bird population. - Loïc A Hardouin
1. A high immediate mortality rate of released animals is an important cause of translocation failure (release cost). Post-release dispersal (i.e. the movements from the release site to the first breeding site) has recently been identified as another source of local translocation failure. In spite of their potential effects on conservation program outcomes, little is known about the quantitative effects of these two sources of translocation failure and their interactions with environmental facto...
Keywords: Ecology
Downloads: 5
[texts]kun chong tu pu (Volume 1) - wang yun wu zhou jian ren

Keywords: ecology
Downloads: 153
[texts]On a solution of the biodiversity paradox and a competitive coexistence principle - Lev V. Kalmykov
The biodiversity paradox is the central problem in theoretical ecology. The paradox consists in the contradiction between the competitive exclusion principle and the observed biodiversity. This contradiction is the key subject of the long-standing and continuing biodiversity debates. The paradox impedes our insights into biodiversity conservation. Previously we proved that due to a soliton-like behaviour of population waves complete competitors can indefinitely coexist in one closed homogeneous ...
Keywords: Ecology
Downloads: 5
[texts]Assessing the Use of Antiviral Treatment to Control Influenza - Sarah C Kramer
Vaccines are the cornerstone of influenza control policy, but can suffer from several drawbacks. Seasonal influenza vaccines are prone to production problems and low efficacies, while pandemic vaccines are unlikely to be available in time to slow a rapidly spreading global outbreak. Antiviral therapy was found to be beneficial during the influenza A(H1N1)pdm09 pandemic even with limited use; however, antiviral use has decreased further since then...
Keywords: Ecology
Downloads: 7
[texts]Pushed beyond the brink: Allee effects, environmental stochasticity, and extinction - Gregory Roth
To understand the interplay between environmental stochasticity and Allee effects, we analyze persistence, asymptotic extinction, and conditional persistence for stochastic difference equations. Our analysis reveals that persistence requires that the geometric mean of fitness at low densities is greater than one. When this geometric mean is less than one, asymptotic extinction occurs with high probability for low initial population densities...
Keywords: Ecology
Downloads: 4
[texts]Spatial distribution and seasonal fluctuations of Drosophila on Santa Catalina Island with an emphasis on the repleta species group - Joyce Y Kao
Santa Catalina Island is a small island off the coast of southern California and for its modest size harbors several species of flies from the Drosophila genus. We performed an island-wide survey of Drosophila species to ascertain which species were endemic to the island and where they were most abundant. In doing so, we have assembled useful sampling information for researchers who wish to conduct field studies on Santa Catalina Island...
Keywords: Ecology
Downloads: 4
[texts]The Effectiveness of China’s National Forest Protection Program and National-level Nature Reserves, 2000 to 2010 - Guopeng Ren
There is profound interest in knowing the degree to which Chinas institutions are capable of protecting its natural forests and biodiversity in the face of economic and political change. Chinas two most important forest protection policies are its National Forest Protection Program (NFPP) and its National-level Nature Reserves (NNRs). The NFPP was implemented in 17 provinces starting in the year 2000 in response to deforestation-caused flooding...
Keywords: Ecology
Downloads: 1
[texts]mangal - making complex ecological network analysis simpler - Timothée E Poisot
The study of ecological networks is severely limited by (i) the difficulty to access data, (ii) the lack of a standardized way to link meta-data with interactions, and (iii) the disparity of formats in which ecological networks themselves are represented. To overcome these limitations, we conceived a data specification for ecological networks. We implemented a database respecting this standard, and released a R package ( \`rmangal\`) allowing users to programmatically access, curate, and deposit...
Keywords: Ecology
Downloads: 10
[texts]Burrow architectural types of the Atlantic ghost crab, Ocypode quadrata (Fabricius, 1787) (Brachyura: Ocypodidae), in Brazil - Willian T. A. F. Silva
A broad range of aspects from paleontology to physiology of the ghost crabs Ocypode quadrata have been studied worldwide. These crabs have been used as ecological indicators of the levels of anthropogenic impacts on sandy beaches. Our aim is to report the variety of burrow architecture types constructed by ghost crabs Ocypode quadrata on beaches of Maceió, Brazil. We found 20 types of burrows that differ in shape (number of axes, number of openings, orientation of blind end, number of branches)...
Keywords: Ecology
Downloads: 9
[texts]A Component land classification for the United States : status report - Driscoll, Richard S., 1928-
Bibliography: p. 17-19
Keywords: Ecology
Downloads: 150
[texts]Data-intensive multidimensional modeling of forest dynamics - Jean F Lienard
Forest dynamics are highly dimensional phenomena that are poorly understood theoretically. Modeling these dynamics is data-intensive and requires repeated measurements taken with a consistent methodology. Forest inventory datasets offer unprecedented opportunities to model these dynamics, but they are analytically challenging due to high dimensionality and sampling irregularities across years. We develop a methodology for predicting forest stand dynamics using such datasets...
Keywords: Ecology
Downloads: 6
[texts]lin xue gai lun (Volume 4) - zhang hua ling wu bao qun (yi)

Keywords: ecology
Downloads: 189
[texts]Estimating seed bank accumulation and dynamics in three obligate-seeder Proteaceae species - Meaghan E. Jenkins
The seed bank dynamics of the three co-occurring obligate-seeder (i.e. fire-sensitive) Proteaceae species, Banksia ericifolia, Banksia marginata and Petrophile pulchella, were examined at sites of varying time since the most recent fire (i.e. plant age) in the Sydney region. Significant variation among species was found in the number of cones produced, the position of the cones within the canopy, the percentage of barren cones produced (Banksia species only), the number of follicles/bracts produ...
Keywords: Ecology
Downloads: 5
[texts]Social, spatial and temporal segregation in an ant society - Lauren E Quevillon
abstract forthcoming.
Keywords: Ecology
Downloads: 11
[texts]lin ye sheng chan jie ling biao - zhong hua ren min gong he guo lin ye bu zao lin si he zuo lin chu

Keywords: ecology
Downloads: 238
[texts]A solution to the biodiversity paradox by logical deterministic cellular automata - Lev V. Kalmykov
The paradox of biological diversity is the key problem of theoretical ecology. The paradox consists in the contradiction between the competitive exclusion principle and the observed biodiversity. This principle was formulated incorrectly because of limitations of the traditional black-box models of interspecific competition. The principle is very important as the basis for understanding evolutionary processes...
Keywords: Ecology
Downloads: 3
[texts]The web of life : a first book of ecology - Storer, John H. (John Humphries), b. 1888
"A Mentor book."
Keywords: Ecology
Downloads: 180
[texts]Early warning signs in social-ecological networks - Samir Suweis
A number of social-ecological systems exhibit complex behaviour associated with nonlinearities, bifurcations, and interaction with stochastic drivers. These systems are often prone to abrupt and unexpected instabilities and state shifts that emerge as a discontinuous response to gradual changes in environmental drivers. Predicting such behaviours is crucial to the prevention of or preparation for unwanted regime shifts...
Keywords: Ecology
Downloads: 7
[texts]lin xue gai lun (Volume 5) - zhang hua ling wu bao qun (yi)

Keywords: ecology
Downloads: 226
[texts]The determinants of alpine butterfly richness and composition vary according to the ecological traits of species - Vincent Sonnay
Predicting spatial patterns of species diversity and composition using suitable environmental predictors is an essential element in conservation planning. Although species have distinct relationships to environmental conditions, some similarities may exist among species that share functional characteristics or traits. We investigated the relationship between species richness, composition and abiotic and biotic environment in different groups of butterflies that share ecological characteristics...
Keywords: Ecology
Downloads: 11
[texts]Nutritional aspects of honey bee-collected pollen and constraints on colony development in the eastern Mediterranean - Dorit Avni
Pollen is the main protein and lipid source for honey bees (Apis mellifera), and nutritionally impoverished landscapes pose a threat to colony development. To determine colony nutritional demands, we analyzed a yearly cycle of bee-collected pollen from colonies in the field and compared it to colony worker production and honey bee body composition, for the first time in social insects. We monitored monthly bee production in ten colonies at each of seven sites throughout Israel, and trapped polle...
Keywords: Ecology
Downloads: 8
[texts]liao ning sheng zhang gu tai gu sha zao lin shi yan - zhong guo ke xue yuan lin ye tu rang yan jiu suo

Keywords: ecology
Downloads: 145
[texts]Spatial variation in water loss predicts terrestrial salamander distribution and population dynamics - William Peterman
Many patterns observed in ecology, such as species richness, life history variation, habitat use, and distribution have physiological underpinnings For many ectothermic organisms temperature relations shape these patterns, but for terrestrial amphibians, water balance may supersede temperature as the most critical physiologically-limiting factor. Many amphibian species have little resistance to water loss, which restricts them to moist microhabitats and may significantly affect foraging, dispers...
Keywords: Ecology
Downloads: 8
[texts]Sap flow through petioles and petioles reveals leaf-level responses to light and vapor pressure deficit in the tropical tree Tabebuia rosea (Bignoniaceae) - Adam Roddy
Continuous measurements of sap flow have been widely used to measure water flux through tree stems and branches. However, these measurements lack the resolution necessary for determining fine-scale, leaf-level responses to environmental variables. We used the heat ratio method to measure sap flow rates through leaf petioles and leaflet petiolules of saplings of the tropical tree Tabebuia rosea (Bignoniaceae) to determine how leaf and leaflet sap flow responds to variation in light and vapor pres...
Keywords: Ecology
Downloads: 7
[texts]Response to climate change is related to species traits in the Lagomorpha - Katie Leach
Climate change during the last five decades has impacted on natural systems significantly and the rate of current climate change is of great concern among conservation biologists. Here, we assess the projected change in the bioclimatic envelopes of all 87 species in the mammalian order Lagomorpha under future climate using expertly validated species distribution models. Results suggest that climate change will impact more than two-thirds of Lagomorphs, with leporids (rabbits, hares and jackrabbi...
Keywords: Ecology
Downloads: 7
[texts]Some plants don’t play games: An ideal free distribution explains the root production of plants that do not engage in a tragedy of the commons game. - Gordon McNickle
1. Game theoretic models that seek to predict the most competitive strategy plants use for competition in soil are clear; they generally predict that over-proliferation of roots is the only evolutionarily stable strategy. However, empirical studies are equally clear that not all plants employ this strategy of over-proliferation of roots. Here, our goal was to develop and test an alternative non-game theoretic model that can be used to develop alternative hypotheses for plants that do not appear ...
Keywords: Ecology
Downloads: 9
[texts]lin xue gai lun (Volume 3) - cai yi chun wu bao qun (yi)

Keywords: ecology
Downloads: 184
[texts]The impacts of historical barriers on floristic patterns of plant groups with different dispersal abilities in the Ryukyu Archipelago, Japan - Koh Nakamura
The effects of historical barriers in biogeographical patterns are expected to persist differently depending on dispersal abilities of organisms. We tested two hypotheses that plant groups with different dispersal abilities display different floristic patterns, and that historical barriers can explain floristic differentiation patterns in plants with low dispersal ability but not in plants with higher dispersal ability, in the seed plant flora of the Ryukyu Archipelago...
Keywords: Ecology
Downloads: 5
[texts]Misuse of the null hypothesis in data reporting and interpretation : report - King, D. E. C
"PIBS2201"
Keywords: Ecology
Downloads: 338
[texts]jiang xi zhong yao (Volume 2) - jiang xi sheng zhong yi yao yan jiu suo

Keywords: ecology
Downloads: 218
[texts]Complex behavioral manipulation drives mismatch between host and parasite diversity - Fabricio Baccaro
Parasites and hosts are intimately associated such that changes in the diversity of one partner are thought to lead to changes in the other. We investigated this linked diversity hypothesis in a specialized ant-Ophiocordyceps system in three forests across 750 km in Central Amazonia. All species belonging to the fungal genus Ophiocordyceps associated with ants have evolved some degree of behavioral control to increase their own transmission, but the leaf-biting behavior is the most complex form ...
Keywords: Ecology
Downloads: 10
[texts]min jian shu cai zhu cang fa - shang ye bu shu cai guo pin shang ye ju hui bian

Keywords: ecology
Downloads: 218
[texts]lin ye ming ci - zhong guo ke xue yuan bian yi ju

Keywords: ecology
Downloads: 292
[texts]shan xi sheng shui tu bao chi jing yan jie shao 陕西省水土保持经验介绍 (Volume 2) - shan xi sheng shui li ting 陕西省水利厅

Keywords: ecology
Downloads: 154
[texts]A comparison of the gobiid fauna between a shoal and an island habitat in the central Visayas (Philippines) - Klaus M. Stiefel
We surveyed the marine gobies of Malapascua island (Philippines), the surrounding islets and the nearby Monad shoal. We found 59 species in 19 genera, including 2 undescribed species of the genus Trimma, and 3 geographic and 6 depth range expansions. Furthermore we describe a new type of mimicry between the goby Koumasetta hectori and the cardinalfish Apogon nigrofasciatus. The comparison of the island versus shoal goby fauna showed a lesser species richness of shrimpassociated gobies at the sho...
Keywords: Ecology
Downloads: 6
[texts]meng gu ren min gong he guo zhi bei de ji ben te dian - li ji tong (yi)

Keywords: ecology
Downloads: 441
[texts]ji lin sheng zhong yao shou ce - ji lin sheng wei sheng ting

Keywords: ecology
Downloads: 243
[texts]ji lin sheng zhi lin ye - nan man tie lu diao cha ke

Keywords: ecology
Downloads: 235
[texts]A novel inference of the fundamental biodiversity number for multiple immigration-limited communities - Champak Beeravolu Reddy
Neutral community theory postulates a fundamental quantity, θ, which reflects the species diversity on a regional scale. While the recent genealogical formulation of community dynamics has considerably enhanced quantitative neutral ecology, its inferential aspects have remained computationally prohibitive. Here, we make use of a generalized version of the original two-level hierarchical framework in order to define a novel estimator for θ, which proves to be computationally efficient and robus...
Keywords: Ecology
Downloads: 14
[texts]Building realistic assemblages with a Joint Species Distribution Model - David J. Harris
1. Species distribution models (SDMs) can be used to predict how individual species\---|and whole assemblages of species\---|will respond to a changing environment. Until now, these models have either assumed (1) that species' occurrence probabilities are uncorrelated, or (2) that species respond linearly to preselected environmental variables. These two assumptions currently prevent ecologists from modeling assemblages with realistic co-occurrence and species richness properties...
Keywords: Ecology
Downloads: 13
[texts]jie kang xing fang xian jun de fen lei wen ti - dai guan qun yuan yong sheng (yi)

Keywords: ecology
Downloads: 203
[texts]Os cabotinos - Ruano, António. cn
Mode of access: Internet
Keywords: ecology
Downloads: 194
[texts]mian hua zai pei xue - shi zhen

Keywords: ecology
Downloads: 198
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